(malacology) radula

tooth

tongue

To perform; to do; to conduct oneself; to carry out.

a mollusc (soft-bodied invertebrate of phylum Mollusca)

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

to research, to study

a piece of research, a study, investigation